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Application Requirements of Stainless Steel Pipes in Various Fields

Oct. 26, 2020

1. Fluid transportation such as water and gas

First of all, in terms of its corrosion resistance, cast iron pipes, carbon steel pipes, plastic pipes, etc. cannot be compared. The reason is that there is a dense chromium oxide protective film on the surface of the Stainless Steel Tube. If it is scratched, a new oxide protective film will be formed immediately in the presence of air. This new oxide protective film can withstand 30 m/ s The impact of high flow rate can resist the corrosion caused by the vortex flowing through the nozzle, elbow, valve and pump. Therefore, when using stainless steel water supply pipes, it is not necessary to consider its corrosion margin. The biggest killer of pipeline leakage is gas, and 304 stainless steel can withstand 200 ppm chloride, and 316 stainless steel can withstand 1,000 ppm chloride natural water, which has a direct impact on large buildings; from the electric potential sequence, Compared with carbon steel and cast iron, stainless steel is not easy to play a chemical role, and it is assembled with copper-based alloy joints (or copper hot water pumps), which has strong practicability and good performance, so stainless steel pipes have very good corrosion resistance.

Secondly, the wall of the stainless steel pipe is 1/3 of that of the galvanized pipe, which is not only light in weight, but also has the effect of reducing transportation and installation costs. In addition, DN 25 mm and above pipes belong to the category of high-diameter-wall ratio, with smooth inner wall and low friction. Under the same working condition, the flow rate is larger than other metal pipes; the thermal conductivity is small, and the thermal insulation performance is good.

Moreover, from the perspective of adapting to the environmental protection requirements of the new era, stainless steel pipes are non-toxic and non-fouling, and can prevent secondary pollution of the pipeline; resistant to various acid, alkali and salt solutions, resistant to high-speed water flow, and the product can be 100% recycled , In line with national industrial policies. So as to save costs, adapt to the needs of the development of the times, and maintain its own innovation.

Stainless Steel Tube

Stainless Steel Tube

2. Equipment manufacturing and maintenance.

The annual consumption of stainless steel pipe is more than 20,000 tons. This type of industry mainly uses sanitary or antibacterial grade stainless steel pipes. The sanitary seamless pipe made of imported SUS304 and 316L Stainless Steel Pipe can meet the special requirements of various media in the food and biopharmaceutical fields. Antibacterial stainless steel has the advantages of stainless steel and good antibacterial properties. The demand for kitchen equipment, workbenches and utensils in the food industry, medical equipment, tableware and towel holders in daily life, and brackets for refrigerated cabinets is increasing.

3. Automobile industry

Stainless steel is mainly used in the exhaust system, which accounts for more than 1/2 of the total amount of automotive stainless steel, and 80% is ferritic stainless steel. The exhaust gas generated by the automobile engine finally flows out of the muffler through the exhaust gas intake pipe, front pipe, hose, converter, and center pipe. Commonly used steel grades for exhaust systems are 409L, 436L, etc. Automobile mufflers mainly use stainless steel welded pipes. According to calculations, stainless steel pipes used in automobiles account for about 1.5% of the entire downstream consumption of stainless steel pipes, and the use ratio of stainless steel seamless pipes and welded pipes is about 2:1.

4. The petrochemical industry includes the fertilizer industry

There is a huge demand for stainless steel pipes. The industry mainly uses Stainless Steel Seamless Pipes. The specifications include: 304, 321, 316, 316L, 347, 317L, etc. The outer diameter is about ¢18-¢610, and the wall thickness is 6mm-50mm The specific application areas are: furnace tubes, material conveying tubes, heat exchanger tubes, etc.

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